WO2002013379A3 - Amplifier with a universal automatic gain control circuit - Google Patents

Amplifier with a universal automatic gain control circuit Download PDF

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Publication number
WO2002013379A3
WO2002013379A3 PCT/US2001/024307 US0124307W WO0213379A3 WO 2002013379 A3 WO2002013379 A3 WO 2002013379A3 US 0124307 W US0124307 W US 0124307W WO 0213379 A3 WO0213379 A3 WO 0213379A3
Authority
WO
Grant status
Application
Patent type
Prior art keywords
amplifier
control circuit
gain control
automatic gain
includes
Prior art date
Application number
PCT/US2001/024307
Other languages
French (fr)
Other versions
WO2002013379A2 (en )
Inventor
Saleh R Al-Araji
John A Ritchie Jr
Original Assignee
Scientific Atlanta
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03GCONTROL OF AMPLIFICATION
    • H03G3/00Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/005Control by a pilot signal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/10Adaptations for transmission by electric cable
    • H04N7/102Circuits therefor, e.g. noise reducers, equalisers, amplifiers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/44Receiver circuitry
    • H04N5/52Automatic gain control

Abstract

An amplifier (125) includes a gain stage (210) for amplifying a signal received by the amplifier (125). The amplifier (125) also includes an AGC circuit (400) that adjusts the amplification of the gain stage (210) and that includes a comparator (440) for determining whether the input signal is a digital pilot signal or an analog pilot signal. The AGC circuit (400) processes both digital and analog pilot signals and automatically adjusts the processing method depending upon the type of pilot signal.
PCT/US2001/024307 2000-08-04 2001-08-03 Amplifier with a universal automatic gain control circuit WO2002013379A3 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US09632526 US6995806B1 (en) 2000-08-04 2000-08-04 Amplifier with a universal automatic gain control circuit
US09/632,526 2000-08-04

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP20010959453 EP1314245B1 (en) 2000-08-04 2001-08-03 Amplifier with a universal automatic gain control circuit
DE2001641469 DE60141469D1 (en) 2000-08-04 2001-08-03 Ungssteuerung
DE2001959453 DE1314245T1 (en) 2000-08-04 2001-08-03 Amplifier with universal automatic gain control

Publications (2)

Publication Number Publication Date
WO2002013379A2 true WO2002013379A2 (en) 2002-02-14
WO2002013379A3 true true WO2002013379A3 (en) 2003-03-06

Family

ID=24535855

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/024307 WO2002013379A3 (en) 2000-08-04 2001-08-03 Amplifier with a universal automatic gain control circuit

Country Status (5)

Country Link
US (1) US6995806B1 (en)
EP (1) EP1314245B1 (en)
DE (2) DE60141469D1 (en)
ES (1) ES2195800T1 (en)
WO (1) WO2002013379A3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3773873B2 (en) * 2002-05-24 2006-05-10 三洋電機株式会社 Broadcast receiver
US7787850B2 (en) * 2007-09-05 2010-08-31 Broadcom Corporation Multi-input multi-output transceiver with power consumption management based on receiver parameter and method for use therewith
CN103563252B (en) * 2011-06-30 2016-08-17 日本电信电话株式会社 Automatic gain control circuit
US9166546B2 (en) 2011-10-24 2015-10-20 Cochlear Limited Post-filter common-gain determination

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57143950A (en) * 1981-03-03 1982-09-06 Nec Corp Monitoring circuit for auxiliary circuit
US5408698A (en) * 1991-03-26 1995-04-18 Kabushiki Kaisha Toshiba Radio tele-communication device having function of variably controlling received signal level
US5565932A (en) * 1994-11-08 1996-10-15 Zenith Electronics Corp. AGC system with pilot using digital data reference
EP0769873A1 (en) * 1995-10-17 1997-04-23 Paradyne Corporation Radio frequency receiver adapted to receive one or more modulated signals

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4371842A (en) * 1980-10-24 1983-02-01 Sperry Corporation Self-adjusting dual mode automatic gain control circuit
US4434439A (en) 1982-02-22 1984-02-28 Rca Corporation Digital television AGC arrangement
US4797735A (en) 1985-07-04 1989-01-10 Matsushita Electric Industrial Co., Ltd. Distortion surveillance apparatus for television signal transmission system
US5187809A (en) * 1990-08-24 1993-02-16 Motorola, Inc. Dual mode automatic gain control
US5293405A (en) 1991-10-31 1994-03-08 International Business Machines Corp. Adaptive equalization and regeneration system
US6725463B1 (en) * 1997-08-01 2004-04-20 Microtune (Texas), L.P. Dual mode tuner for co-existing digital and analog television signals

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57143950A (en) * 1981-03-03 1982-09-06 Nec Corp Monitoring circuit for auxiliary circuit
US5408698A (en) * 1991-03-26 1995-04-18 Kabushiki Kaisha Toshiba Radio tele-communication device having function of variably controlling received signal level
US5565932A (en) * 1994-11-08 1996-10-15 Zenith Electronics Corp. AGC system with pilot using digital data reference
EP0769873A1 (en) * 1995-10-17 1997-04-23 Paradyne Corporation Radio frequency receiver adapted to receive one or more modulated signals

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 243 (E - 145) 2 December 1982 (1982-12-02) *

Also Published As

Publication number Publication date Type
DE1314245T1 (en) 2003-11-27 grant
EP1314245A2 (en) 2003-05-28 application
ES2195800T1 (en) 2003-12-16 application
DE60141469D1 (en) 2010-04-15 grant
US6995806B1 (en) 2006-02-07 grant
EP1314245B1 (en) 2010-03-03 grant
WO2002013379A2 (en) 2002-02-14 application

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